RU2339476C2 - Method and device for rolling and following coiling of metal strip, ia, steel strip - Google Patents

Abstract

FIELD: process flows.

SUBSTANCE: method and device include coiling of metal strip after rolling at least to one collapsible drum of coiling machine. The metal strip is periodically inspected lengthwise for rolling defects. The base of coiling machine is located under the plane of test desk installed at the level and along rolling line. The strip specimen is cut, forwarded to test desk located above the base of coiling machine then stopped and inspected.

EFFECT: cost-efficient and fast inspection of strip specimen at continuous rolling process.

12 cl, 3 dwg

Description

The invention relates to a rolling method and subsequent winding of a metal strip, in particular a steel strip, onto at least one rotational expanding drum, wherein the metal strip in the length sections is checked for rolling errors.

From practice, a carousel winder with a separate check line is known. The steel strip emerging from the rolling mill is wound into rolls. To check the strip, it is necessary to remove the entire roll from the material flow and examine for defects during rolling. This study is time consuming and very unprofitable economically. However, there is only a slight possibility of access and, on the other hand, the cause of rolling errors can be eliminated with a delay. You should also consider the significant loss in time during which production continues with errors.

Carousel winders with twin winding reels are known (EP 0812634 B1). However, such a design does not consist directly in connection with the check line.

The next rotary winder with two winding drums (EP 1039970 B1) offers a suitable drive design for winding drums.

Another design of a carousel winder with two winding drums (EP 0773178 B1) also relates to the design of drives for winding drums, so the connection of the test line to the winder base is also not considered here.

The basis of the invention is to propose a method for rolling and subsequent winding of a metal strip, in particular a steel strip, and a device that allows cost-effective and quick verification of strip samples during a continuous rolling process.

The problem is solved according to the invention by the fact that a sample of the strip within the rolling line "in line" is held along above the base of the coiler below the inspection table for free viewing and stops. As a result of this, significant advantages are achieved in relation to the method of a separate check outside the rolling line: during a test cut, a sheet of steel is drawn directly to the check table, so that the sources of errors during the rolling process can be determined more quickly. In this case, only one sample of the strip in the form of a sheet of steel is needed, and not the entire roll isolated from the material flow. However, a short access time is possible in order to carry out a quick check. The costs of an additional test coiler, as well as a machine for removing coiled rolls, can be saved.

The rolling process is advantageously supported according to further features by the fact that after cutting the strip sample, the new beginning of the strip is directed down, under the inspection table and wound on the upper reel drum or on the lower reel drum. This process is carried out without interrupting the continuous rolling process.

The development of the design consists in the fact that strip samples are inhibited by strip conveyors, which are built into the inspection table.

Further, it is particularly advantageous that the roll wound on the upper drum of the winder is rotated 180 ° during the continuous rolling process and is finally wound up to a predetermined maximum roll diameter.

The transportation of finished rolled coils can be improved by the fact that the coils wound on the lower reel drum are lowered and transported parallel to the axis of the reel drum. In this case, coiled rolls can be lowered directly by the roll lifting device.

Part of the invention, which relates to a device, relates to a device for rolling and subsequently winding a metal strip, in particular a steel strip, which is located behind the rolling mill, directly behind the last rolling stand, and is equipped with a check device for examining the metal strip for rolling defects.

The problem is solved according to the invention by the fact that the base of the winder is located under the plane of the inspection table, passing at the level of the rolling line, on which the strip sample can be freely inspected.

The steel strip emerging from the last rolling stand can be carried out in such a way that a deflecting unit is provided at the entrance to the coiler base to deflect the metal strip to at least one reel coil.

The metal strip can be distributed along the residual length on both reels of the coiler if, according to the following embodiment, the coiler base is each time formed from the upper and lower reels of the coiler located eccentrically within the rotary frame.

In addition, switching the reel drums by 180 ° is achieved by the fact that the upper and lower reels of the winder lie on a diametrical plane passing through the central axis of the rotary frame and can be rotated 180 °.

As tests have shown, it is particularly preferable if the diametrical plane passes at an angle to the horizontal from about 15 to 25 °.

A rotation of 180 ° is thus achieved due to the fact that the rotary frame for the reel drums is mounted in bearings on the support rolls having a drive for rotation.

Further, winding on the lower reel of the coiler can be improved by the fact that a hinged or pivoting bracket with a pressure roller is attached to the lower reel of the coiler.

The drawings show an example embodiment of the invention, which is explained in more detail below.

The drawing shows:

Figure 1 is a side view of the base of the winder with an inspection line,

Figure 2 is the same side view of the base of the winder with the inspection table on an enlarged scale and

Figure 3 is an even more enlarged view of the base of the winder.

On a rolling mill, for example a continuous rolling mill, behind the last rolling stand 2 of the rolling line 2a, a metal strip 1, in particular a steel strip 1, based on a sample 1a of a strip several meters long, is checked for deviations (anomalies), for example, in the surface , in geometry, differences in thickness, waviness, etc. The output device intended for this consists of successive devices 3 for measuring thickness, a measuring device 4 for an edge profile, a measuring roller 5 for evaluating flatness, a guide table 6, a first drive unit 7, drum scissors 8 for cutting a strip sample 1a, a second the drive unit 9 and the deflecting unit 10. In the continuation of the rolling line 2A there is a check table 11. As soon as the drum scissors 8 receive a cutting signal, within the rolling line 2a, a strip pattern 1a is formed along the line, it moves along above the reeling base 18 below to the inspection table 11 and stops for free viewing in the strip stopping device 12. In this case, the strip sample 1a is inhibited by the conveyors 17, which are provided on successive inspection tables 11.

Next, the samples 1A of the strip are transported by means of a third drive unit 13 into scissors 14, and then cut into pieces and fall on an inclined tray 15 into the cart 16 for iron scrap. The transport drive of the strip samples 1a is represented by conveyors 17. To stop the strip during inspection, the strip stopping device 12 is rejected.

In Fig.2, the base 18 of the winder is presented in more detail. It comprises a pivoting frame 19 of a coiler, which can be pivoted around a pivot axis 19b by means of a separate hydraulic pivot drive 19a. In the base 18 of the winder are rotatable upper drum 20 of the winder and lower drum 21 of the winder. The upper drum 20 of the winder is surrounded by two arms 22 of the winder. The brackets 22 of the coiler can be rotated or retracted by a hydraulic drive 26 for turning the bracket of the coiler (see also FIG. 3).

After cutting off the strip sample 1a, the new beginning of the strip is directed downward, under the inspection table 11 by means of a deflecting unit 10, and wound on the upper drum 20 of the winder or on the drum 21 of the winder. The rolling process during this cutting process is not interrupted.

The coil 25 wound on the upper drum 20 of the coiler is rotated 180 ° during continuous rolling production and is finally wound up to a predetermined maximum diameter of the coil 25a.

The coils 25 wound on the lower reel 21 of the coiler are lowered by means of a hoisting device 24 for the coil and transported outward on the machine 23 for taking out the rolled coils parallel to the axis of the coiler drum.

Figure 2 and, respectively, figure 3 further shows that at the entrance 27 to the base 18 of the winder, the deflecting unit 10 bends the metal strip 1 from the rolling line 2a to the desired angle towards the drum 20 and / or 21 of the winder. In addition to the rotary frame 19 of the winder, the base 18 of the winder has a rotary frame 28 on which the drums 20 and 21 of the winder are mounted rotatably in bearings and connected to the drive. The reels 20 and 21 of the coiler lie eccentrically to the central axis 28a of the swing frame 28 at equal distances in diameter. The pivoting frame 28 is supported by support rolls 29, which have a drive for rotation. The diameter line runs at an angle to the horizontal from about 15 to 25 °. Roll 25 (FIG. 3) can be wound up to a maximum roll diameter 25a. In the area of the lower drum 21 of the coiler, in the chamber of the base 18 of the coiler is a pivotally attached bracket 30, which has a pressure roller 31 at its front end. The bracket 30 can deviate forward and backward from the resting position shown by the thick dashed lines to the working position shown by thin dash-dotted lines.

List of basic designations

1 metal strip, steel strip

1a Sample strip

2 rolling stand (last)

2a rolling line

3 Thickness measuring instrument

4 Measuring instrument for edge profiles

5 Measuring roller

6 Guide table

7 First drive unit

8 Drum Shears

9 Second drive unit

10 Deflector

11 Check table

12 Strip stop device

13 Third drive roll assembly

14 scissors

15 Tilt Tray

16 Iron scrap trolley

17 Conveyor

18 Base winder

19 Swing frame

19a Swing drive (hydraulic)

19b Swivel Axis

20 Upper Drum Winder

21 Lower reel

22 Bracket for winder

23 Roll-up roll removal machine

24 Lifting device for rolls

25 rolled up

25a maximum roll diameter

26 Drive (hydraulic) rotation bracket arm winder

27 Entrance to the coiler base

28 swing frame

28a Central axis of the swing frame

29 backup rolls

30 Bracket

31 Pinch roller.

Claims (12)

1. A method of winding a metal strip (1), in particular a steel strip, after rolling at least one rotary-winding expanding drum (20) of the coiler, in which the metal strip (1) in lengthwise sections is checked for rolling defects characterized in that the base of the winder (18) is placed under the plane of the inspection table (11) passing at the level and along the rolling line (2a) of the test table, while the strip sample (1a) within the rolling line is cut off and sent along above the winding base to the inspection table stop him and osm under study is. 2. The method according to claim 1, characterized in that after cutting off the strip sample (1a), a new initial strip section is sent down under the inspection table (11) and wound on the upper drum (20) of the winder or on the lower drum (21) of the winder. 3. The method according to claim 2, characterized in that the strip sample (1a) is stopped by means of conveyors (17), which are integrated in the inspection table (11). 4. The method according to any one of claims 1 to 3, characterized in that the roll (25) wound on the upper drum (20) of the winder during a continuous rolling course is rotated 180 ° on the swing frame (28) and finally wound up to a predetermined maximum diameter (25a) roll. 5. The method according to claim 4, characterized in that the coils (25) wound on the lower reel (21) are lowered down and transported parallel to the axis of the reel drum. 6. A device for winding a metal strip (1), in particular a steel strip, after rolling, located behind the rolling mill, immediately after the last rolling stand (2), and equipped with a check device for examining the metal strip (1) for rolling defects, characterized the fact that the base (18) of the winder is located below the plane of the inspection table (11) passing at the level and along the rolling line (2a), on which the strip sample is freely inspected. 7. The device according to claim 6, characterized in that at the entrance (27) to the base (18) of the coiler, a deflecting unit (10) is provided for deflecting the metal strip (1) in the direction of at least one drum (20, 21) winders. 8. Device according to any one of claims 6 or 7, characterized in that the base (18) of the winder is formed by the upper drum (20) of the winder and the lower drum (21) located eccentrically within the rotary frame (28) and located eccentrically within the rotary frame (28) ) winders. 9. The device according to claim 8, characterized in that the upper drum (20) of the winder and the lower drum (21) of the winder lie in one diametrical plane passing through the central axis (28a) of the rotary frame (28). 10. The device according to claim 9, characterized in that said diametrical plane extends at an angle to the horizontal from about 15 to 25 °. 11. The device according to claim 8, characterized in that the rotary frame (28) for the reels (20, 21) of the coiler is mounted in bearings on the support rolls (29) having a drive for rotation. 12. The device according to claim 8, characterized in that the lower drum (21) of the winder has a hinged or swivel bracket (30) with a pressure roller (31).

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